Looks new
All the photos that include the roof with the distinctive vents that look like dormer windows were taken at Nine Elms.
T9 class 773 was built by Dubs and exhibited at the Glasgow Trade Fair before delivery to the LSWR in 1901. It lost the exhibition (and slightly non standard) LSWR livery in 1905 (Reference D. L. Bradley, LSWR Locomotives, The Drummond Classes)